Her eyes were the blue of a very hot flame.

I think he's trying to make some sort of very hot flame.

Over the hot flame his hands were trembling and cold with fear.

A fire that would flame hot and high, then die away to nothing but ash.

The type of glass to use next to the hot flame was a problem eventually solved.

This is why the very hot flames emit blue light.

The mixture of gas and air produces a very hot flame.

He could reach into the hottest flames and not get burned.

It also makes a very hot flame that can melt iron.

And then, with a final hiss of protest, the hot flames suddenly died away.